Good use of Enumerable#select, but see if you can implement find_even without using it.
Good test caes / sanity checks. There are a few "corner cases" that might've been worth testing. Also gave an example of how to test your methods with random input.
Remarked about using git status to avoid unintentional commits.
https://github.com/dwhite96/web-fundamentals-weekly-katas/blob/master/week-02/find_even.rb